According to some revisionist historians, the Rex Deus (Latin
for "King God") bloodline is, the European branch of the descendants of both
high priest Aaron and king David of ancient Israel, an elite of diaspora
Israelites who have managed to preserve their dual lineage intact for some
2,000 years and have appointed themselves as the custodians of the mysteries
of Judaism and Christianity.

They further speculate that the Rex Deus bloodline included
Jesus, Mary Magdalene and the Desposyni, and that it may have
been the progenitor of the Merovingian dynasty.

To avoid persecution the Rex Deus bloodline adopted the
philosophy of blending in with whatever culture and religion
they happened to be in the presence of while secretly passing on
from generation to generation their true beliefs and rituals.

They also did this indirectly by disseminating certain ideas
which became embedded within the psyche of the people of Europe.
A notable example would be Arthurian legend and Grail lore.

Fringe researchers argue that the "shadow court" of the Rex Deus
ordered the first Knights Templar to dig tunnels beneath the
Temple Mount to find the Copper Scroll treasure, which their
ancestors among the Qumran Essenes had buried there.

They suggest that this might explain one of the charges of
heresy which were later brought against the knights by the
Medieval Inquisition.